upc/role.go

package main

import (
	"bytes"
	"encoding/json"
	"flag"
	"fmt"
	"libshared"
	"net/http"
	"os"
)

type AssumeRoleRequest struct {
	Rolename string `json:"rolename"`
}

type AssumeRoleResponse struct {
	Token string `json:"token"`
}

var roleattachpolicyCmd *flag.FlagSet

var roleCommands = []Command{
	{
		Names:       []string{"attach-policy"},
		Description: "Role Management",
		Handler:     roleAttachPolicy,
	},
	{
		Names:       []string{"detach-policy"},
		Description: "Role Management",
		Handler:     roleDetachPolicy,
	},
	{
		Names:       []string{"assume-role"},
		Description: "Role Management",
		Handler:     assumeRole,
	},
}

func assumeRole(args []string) {
	fmt.Println("I assume something")

	var targetRole string
	var useIdentity string
	roleAssumeRoleCmd := flag.NewFlagSet("assume-role", flag.ExitOnError)
	roleAssumeRoleCmd.StringVar(&targetRole, "r", "", "Target role (required)")
	roleAssumeRoleCmd.StringVar(&targetRole, "role", "", "Target role (required)")
	roleAssumeRoleCmd.StringVar(&useIdentity, "identity", "", "Identity to use (required)")

	roleAssumeRoleCmd.Parse(args)

	if targetRole == "" {
		fmt.Println("Error: either -r or --role is required")
		os.Exit(1)
	}
	if useIdentity == "" {
		fmt.Println("Error: either --identity is required")
		os.Exit(1)
	}

	identityData, err := os.ReadFile("/home/farhan/.pcloud/identities/" + useIdentity + ".json")
	if err != nil {
		fmt.Printf("Error opening identity file: %v\n", err)
		os.Exit(1)
	}

	var identityToken IdentityToken
	err = json.Unmarshal(identityData, &identityToken)
	if err != nil {
		fmt.Printf("Error reading identity file: %v\n", err)
		os.Exit(1)
	}

	apiendpoint := endpoint + "/role/assume-role"

	var assumerolerequest AssumeRoleRequest
	assumerolerequest.Rolename = targetRole

	jsonData, err := json.Marshal(assumerolerequest)
	if err != nil {
		fmt.Println("Error marshaling JSON:", err)
		return
	}

	req, err := http.NewRequest("POST", apiendpoint, bytes.NewBuffer(jsonData))
	if err != nil {
		panic(err)
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", "Bearer "+identityToken.Token)

	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()

	//	var assumeRoleResponse AssumeRoleResponse

	apiresponse := libshared.APIResponse[AssumeRoleResponse]{}

	if err := json.NewDecoder(resp.Body).Decode(&apiresponse); err != nil {
		fmt.Printf("Error reading response: %v\n", err)
		os.Exit(1)
	}

	//	fmt.Println("Response status:", resp.Status)
	fmt.Println("Assumed role token:", apiresponse.Content.Token)

	//	fmt.Printf("Attaching policy '%s' to role '%s'\n", , targetRole)

	fmt.Println("Response status:", resp.Status)
	fmt.Printf("Assuming role '%s'\n", targetRole)
	fmt.Println("Using identity", resp.Body)

	// Write apiresponse.Content to ~/.pcloud/roles/assumed-<rolename>.json
	home, err := os.UserHomeDir()
	if err != nil {
		panic(err)
	}

	dir := fmt.Sprintf("%s/.pcloud/roles", home)
	err = os.MkdirAll(dir, 0700)
	if err != nil {
		fmt.Printf("Error creating directory: %v\n", err)
		os.Exit(1)
	}

	roleData, err := json.MarshalIndent(apiresponse.Content, "", "\t")
	if err != nil {
		fmt.Printf("Error marshaling role data: %v\n", err)
		os.Exit(1)
	}

	roleFile := fmt.Sprintf("%s/%s.json", dir, targetRole)
	err = os.WriteFile(roleFile, roleData, 0600)
	if err != nil {
		fmt.Printf("Error writing role file: %v\n", err)
		os.Exit(1)
	}

	fmt.Printf("Assumed role token saved to %s\n", roleFile)

}

func roleAttachPolicy(args []string) {
	roleattachpolicyCmd := flag.NewFlagSet("attach-policy", flag.ExitOnError)

	//var policyToAttach string
	var targetRole string
	var useIdentity string

	roleattachpolicyCmd.StringVar(&targetRole, "role", "", "Target role (required)")
	roleattachpolicyCmd.StringVar(&useIdentity, "identity", "", "Identity to use (default: default)")

	roleattachpolicyCmd.Parse(args)

	if targetRole == "" {
		fmt.Println("Error: either --role is required")
		os.Exit(1)
	}
	if useIdentity == "" {
		fmt.Println("Error: either --identity is required")
		os.Exit(1)
	}

	// Open Profile file
	home, err := os.UserHomeDir()
	if err != nil {
		panic(err)
	}
	profileData, err := os.ReadFile(home + "/.pcloud/identities/" + useIdentity + ".json")
	if err != nil {
		fmt.Printf("Error opening profile file: %v\n", err)
		os.Exit(1)
	}

	//	fmt.Println("Length is", len(profileData))

	if len(profileData) == 0 {
		fmt.Printf("Profile file is empty: %s\n", home+"/.pcloud/identities/"+useIdentity+".json")
		os.Exit(1)
	}

	var profileToken ProfileToken
	err = json.Unmarshal(profileData, &profileToken)
	if err != nil {
		fmt.Printf("Error reading profile file: %v\n", err)
		os.Exit(1)
	}

	fmt.Println("Profile Token: ", profileToken.Token)

	apiendpoint := endpoint + "/role/attach-policy"

	req, err := http.NewRequest("POST", apiendpoint, nil) //, bytes.NewBuffer(jsonData))
	if err != nil {
		panic(err)
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", "Bearer YOUR_TOKEN_HERE")

	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()
}

func roleDetachPolicy(args []string) {
	fmt.Println("I detach something")
}

func roleMain(args []string) {
	if len(args) < 1 {
		fmt.Println("Error: subcommand is required")
		os.Exit(1)
	}
	subcommand := args[0]

	cmd := findCommand(subcommand, roleCommands)
	if cmd == nil {
		fmt.Println("Error: unknown command:", subcommand)
		os.Exit(1)
	}

	cmd.Handler(args[1:])

}